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/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) version 3.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>
 *
 *
 * Authors:
 *      Nat Friedman <nat@novell.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <gtk/gtk.h>
#include <glib/gi18n.h>
#include <string.h>

#include <libebook/e-book.h>
#include <libedataserverui/e-source-combo-box.h>

#include <e-util/e-config.h>
#include <mail/em-config.h>
#include <mail/em-event.h>
#include <camel/camel-mime-message.h>
#include <composer/e-msg-composer.h>

#include "bbdb.h"

#define d(x)

/* Plugin hooks */
gint e_plugin_lib_enable (EPluginLib *ep, gint enable);
void bbdb_handle_send (EPlugin *ep, EMEventTargetComposer *target);
GtkWidget *bbdb_page_factory (EPlugin *ep, EConfigHookItemFactoryData *hook_data);

/* For internal use */
struct bbdb_stuff {
    EMConfigTargetPrefs *target;
    ESourceList *source_list;

    GtkWidget *combo_box;
    GtkWidget *gaim_combo_box;
    GtkWidget *check;
    GtkWidget *check_gaim;
};

/* Static forward declarations */
static gboolean bbdb_timeout (gpointer data);
static void bbdb_do_it (EBook *book, const gchar *name, const gchar *email);
static void add_email_to_contact (EContact *contact, const gchar *email);
static void enable_toggled_cb (GtkWidget *widget, gpointer data);
static void source_changed_cb (ESourceComboBox *source_combo_box, struct bbdb_stuff *stuff);
static GtkWidget *create_addressbook_combo_box (struct bbdb_stuff *stuff, gint type);
static void cleanup_cb (GObject *o, gpointer data);

static ESource *
find_esource_by_uri (ESourceList *source_list, const gchar *target_uri)
{
    GSList *groups;

    /* XXX This would be unnecessary if the plugin had stored
     *     the addressbook's UID instead of the URI in GConf.
     *     Too late to change it now, I suppose. */

    if (source_list == NULL || target_uri == NULL)
        return NULL;

    groups = e_source_list_peek_groups (source_list);

    while (groups != NULL) {
        GSList *sources;

        sources = e_source_group_peek_sources (groups->data);

        while (sources != NULL) {
            gchar *uri;
            gboolean match;

            uri = e_source_get_uri (sources->data);
            match = (strcmp (uri, target_uri) == 0);
            g_free (uri);

            if (match)
                return sources->data;

            sources = g_slist_next (sources);
        }

        groups = g_slist_next (groups);
    }

    return NULL;
}

gint
e_plugin_lib_enable (EPluginLib *ep, gint enable)
{
    /* Start up the plugin. */
    if (enable) {
        d(fprintf (stderr, "BBDB spinning up...\n"));

        if (bbdb_check_gaim_enabled ())
            bbdb_sync_buddy_list_check ();

        g_timeout_add_seconds (BBDB_BLIST_CHECK_INTERVAL,
                   (GSourceFunc) bbdb_timeout,
                   NULL);
    }

    return 0;
}

static gboolean
bbdb_timeout (gpointer data)
{
    if (bbdb_check_gaim_enabled ())
        bbdb_sync_buddy_list_check ();

    return TRUE;
}

typedef struct
{
    gchar *name;
    gchar *email;
} todo_struct;

static void
free_todo_struct (todo_struct *td)
{
    if (td) {
        g_free (td->name);
        g_free (td->email);
        g_free (td);
    }
}

static GSList *todo = NULL;
G_LOCK_DEFINE_STATIC (todo);

static gpointer
bbdb_do_in_thread (gpointer data)
{
    EBook *book;

    /* Open the addressbook */
    book = bbdb_open_addressbook (AUTOMATIC_CONTACTS_ADDRESSBOOK);
    if (book == NULL) {
        G_LOCK (todo);

        g_slist_foreach (todo, (GFunc)free_todo_struct, NULL);
        g_slist_free (todo);
        todo = NULL;

        G_UNLOCK (todo);
        return NULL;
    }

    G_LOCK (todo);
    while (todo) {
        todo_struct *td = todo->data;

        todo = g_slist_remove (todo, td);

        G_UNLOCK (todo);

        if (td) {
            bbdb_do_it (book, td->name, td->email);
            free_todo_struct (td);
        }

        G_LOCK (todo);
    }
    G_UNLOCK (todo);

    g_object_unref (book);

    return NULL;
}

static void
bbdb_do_thread (const gchar *name, const gchar *email)
{
    todo_struct *td;

    if (!name && !email)
        return;

    td = g_new (todo_struct, 1);
    td->name = g_strdup (name);
    td->email = g_strdup (email);

    G_LOCK (todo);
    if (todo) {
        /* the list isn't empty, which means there is a thread taking
           care of that, thus just add it to the queue */
        todo = g_slist_append (todo, td);
    } else {
        GError *error = NULL;

        /* list was empty, add item and create a thread */
        todo = g_slist_append (todo, td);
        g_thread_create (bbdb_do_in_thread, NULL, FALSE, &error);

        if (error) {
            g_warning ("%s: Creation of the thread failed with error: %s", G_STRFUNC, error->message);
            g_error_free (error);

            G_UNLOCK (todo);
            bbdb_do_in_thread (NULL);
            G_LOCK (todo);
        }
    }
    G_UNLOCK (todo);
}

static void
walk_destinations_and_free (EDestination **dests)
{
    gint i;

    if (!dests)
        return;

    for (i = 0; dests[i] != NULL; i++) {
        const gchar *name, *addr;

        name = e_destination_get_name (dests[i]);
        addr = e_destination_get_email (dests[i]);

        if (name || addr)
            bbdb_do_thread (name, addr);
    }

    e_destination_freev (dests);
}

void
bbdb_handle_send (EPlugin *ep, EMEventTargetComposer *target)
{
    EComposerHeaderTable *table;
    GConfClient *gconf;
    gboolean enable;

    gconf = gconf_client_get_default ();
    enable = gconf_client_get_bool (gconf, GCONF_KEY_ENABLE, NULL);
    g_object_unref (gconf);

    if (!enable)
        return;

    table = e_msg_composer_get_header_table (target->composer);
    g_return_if_fail (table);

    /* read information from the composer, not from a generated message */
    walk_destinations_and_free (e_composer_header_table_get_destinations_to (table));
    walk_destinations_and_free (e_composer_header_table_get_destinations_cc (table));
}

static void
bbdb_do_it (EBook *book, const gchar *name, const gchar *email)
{
    gchar *query_string, *delim, *temp_name = NULL;
    EBookQuery *query;
    GList *contacts, *l;
    EContact *contact;
    gboolean status;
    GError *error = NULL;

    g_return_if_fail (book != NULL);

    if (email == NULL || !strcmp (email, ""))
        return;

    if ((delim = strchr (email, '@')) == NULL)
        return;

    /* don't miss the entry if the mail has only e-mail id and no name */
    if (name == NULL || ! strcmp (name, "")) {
        temp_name = g_strndup (email, delim - email);
        name = temp_name;
    }

    /* If any contacts exists with this email address, don't do anything */
    query_string = g_strdup_printf ("(contains \"email\" \"%s\")", email);
    query = e_book_query_from_string (query_string);
    g_free (query_string);

    status = e_book_get_contacts (book, query, &contacts, NULL);
    if (query)
        e_book_query_unref (query);
    if (contacts != NULL) {
        for (l = contacts; l != NULL; l = l->next)
            g_object_unref ((GObject *)l->data);
        g_list_free (contacts);
        g_free (temp_name);

        return;
    }

    if (g_utf8_strchr (name, -1, '\"')) {
        GString *tmp = g_string_new (name);
        gchar *p;

        while (p = g_utf8_strchr (tmp->str, tmp->len, '\"'), p)
            tmp = g_string_erase (tmp, p - tmp->str, 1);

        g_free (temp_name);
        temp_name = g_string_free (tmp, FALSE);
        name = temp_name;
    }

    /* If a contact exists with this name, add the email address to it. */
    query_string = g_strdup_printf ("(is \"full_name\" \"%s\")", name);
    query = e_book_query_from_string (query_string);
    g_free (query_string);

    status = e_book_get_contacts (book, query, &contacts, NULL);
    if (query)
        e_book_query_unref (query);
    if (contacts != NULL) {

        /* FIXME: If there's more than one contact with this
           name, just give up; we're not smart enough for
           this. */
        if (contacts->next != NULL) {
            for (l = contacts; l != NULL; l = l->next)
                g_object_unref ((GObject *)l->data);
            g_list_free (contacts);
            g_free (temp_name);
            return;
        }

        contact = (EContact *) contacts->data;
        add_email_to_contact (contact, email);
        if (! e_book_commit_contact (book, contact, &error)) {
            g_warning ("bbdb: Could not modify contact: %s\n", error->message);
            g_error_free (error);
        }

        for (l = contacts; l != NULL; l = l->next)
            g_object_unref ((GObject *)l->data);
        g_list_free (contacts);

        g_free (temp_name);
        return;
    }

    /* Otherwise, create a new contact. */
    contact = e_contact_new ();
    e_contact_set (contact, E_CONTACT_FULL_NAME, (gpointer) name);
    add_email_to_contact (contact, email);
    g_free (temp_name);

    if (! e_book_add_contact (book, contact, &error)) {
        g_warning ("bbdb: Failed to add new contact: %s\n", error->message);
        g_error_free (error);
        return;
    }

    g_object_unref (G_OBJECT (contact));
}

EBook *
bbdb_open_addressbook (gint type)
{
    GConfClient *gconf;
    gchar        *uri;
    EBook       *book = NULL;

    gboolean     status;
    GError      *error = NULL;
    gboolean     enable = TRUE;
    gconf = gconf_client_get_default ();

    /* Check to see if we're supposed to be running */
    if (type == AUTOMATIC_CONTACTS_ADDRESSBOOK)
        enable = gconf_client_get_bool (gconf, GCONF_KEY_ENABLE, NULL);
    if (!enable) {
        g_object_unref (G_OBJECT (gconf));
        return NULL;
    }

    /* Open the appropriate addresbook. */
    if (type == GAIM_ADDRESSBOOK)
        uri = gconf_client_get_string (gconf, GCONF_KEY_WHICH_ADDRESSBOOK_GAIM, NULL);
    else
        uri = gconf_client_get_string (gconf, GCONF_KEY_WHICH_ADDRESSBOOK, NULL);
    g_object_unref (G_OBJECT (gconf));

    if (uri == NULL)
        book = e_book_new_system_addressbook (&error);
    else {
        book = e_book_new_from_uri (uri, &error);
        g_free (uri);
    }

    if (book == NULL) {
        g_warning ("bbdb: failed to get addressbook: %s\n", error->message);
        g_error_free (error);
        return NULL;
    }

    status = e_book_open (book, FALSE, &error);
    if (! status) {
        g_warning ("bbdb: failed to open addressbook: %s\n", error->message);
        g_error_free (error);
        return NULL;
    }

    return book;
}

gboolean
bbdb_check_gaim_enabled (void)
{
    GConfClient *gconf;
    gboolean     gaim_enabled;

    gconf = gconf_client_get_default ();
    gaim_enabled = gconf_client_get_bool (gconf, GCONF_KEY_ENABLE_GAIM, NULL);

    g_object_unref (G_OBJECT (gconf));

    return gaim_enabled;
}

static void
add_email_to_contact (EContact *contact, const gchar *email)
{
    GList *emails;

    emails = e_contact_get (contact, E_CONTACT_EMAIL);
    emails = g_list_append (emails, (gpointer) email);
    e_contact_set (contact, E_CONTACT_EMAIL, (gpointer) emails);
}



/* Code to implement the configuration user interface follows */

static void
enable_toggled_cb (GtkWidget *widget, gpointer data)
{
    struct bbdb_stuff *stuff = (struct bbdb_stuff *) data;
    gboolean active;
    ESource *selected_source;
    gchar *addressbook;

    active = gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (widget));

    /* Save the new setting to gconf */
    gconf_client_set_bool (stuff->target->gconf, GCONF_KEY_ENABLE, active, NULL);

    gtk_widget_set_sensitive (stuff->combo_box, active);

    addressbook = gconf_client_get_string (stuff->target->gconf, GCONF_KEY_WHICH_ADDRESSBOOK, NULL);

    if (active && !addressbook) {
        const gchar *uri = NULL;
        GError *error = NULL;

        selected_source = e_source_combo_box_get_active (
            E_SOURCE_COMBO_BOX (stuff->combo_box));
        if (selected_source != NULL)
            uri = e_source_get_uri (selected_source);

        gconf_client_set_string (
            stuff->target->gconf,
            GCONF_KEY_WHICH_ADDRESSBOOK,
            uri ? uri : "", &error);

        if (error != NULL) {
            g_warning ("%s", error->message);
            g_error_free (error);
        }
    }
    g_free (addressbook);
}

static void
enable_gaim_toggled_cb (GtkWidget *widget, gpointer data)
{
    struct bbdb_stuff *stuff = (struct bbdb_stuff *) data;
    gboolean active;
    ESource *selected_source;
    gchar *addressbook_gaim;

    active = gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (widget));

    /* Save the new setting to gconf */
    gconf_client_set_bool (stuff->target->gconf, GCONF_KEY_ENABLE_GAIM, active, NULL);

    addressbook_gaim = gconf_client_get_string (stuff->target->gconf, GCONF_KEY_WHICH_ADDRESSBOOK_GAIM, NULL);
    gtk_widget_set_sensitive (stuff->gaim_combo_box, active);
    if (active && !addressbook_gaim) {
        selected_source = e_source_combo_box_get_active (
            E_SOURCE_COMBO_BOX (stuff->gaim_combo_box));
        gconf_client_set_string (stuff->target->gconf, GCONF_KEY_WHICH_ADDRESSBOOK_GAIM, e_source_get_uri (selected_source), NULL);
    }

    g_free (addressbook_gaim);
}

static void
synchronize_button_clicked_cb (GtkWidget *button)
{
    bbdb_sync_buddy_list ();
}

static void
source_changed_cb (ESourceComboBox *source_combo_box,
                   struct bbdb_stuff *stuff)
{
    ESource *source;
    GError *error = NULL;

    source = e_source_combo_box_get_active (source_combo_box);

    gconf_client_set_string (
        stuff->target->gconf,
        GCONF_KEY_WHICH_ADDRESSBOOK,
        source ? e_source_get_uri (source) : "", &error);

    if (error != NULL) {
        g_warning ("%s", error->message);
        g_error_free (error);
    }
}

static void
gaim_source_changed_cb (ESourceComboBox *source_combo_box,
                        struct bbdb_stuff *stuff)
{
    ESource *source;
    GError *error = NULL;

    source = e_source_combo_box_get_active (source_combo_box);

    gconf_client_set_string (
        stuff->target->gconf,
        GCONF_KEY_WHICH_ADDRESSBOOK_GAIM,
        source ? e_source_get_uri (source) : "", &error);

    if (error != NULL) {
        g_warning ("%s", error->message);
        g_error_free (error);
    }
}

static GtkWidget *
create_addressbook_combo_box (struct bbdb_stuff *stuff, gint type)
{
    GtkWidget   *combo_box;
    ESourceList *source_list;
    ESource     *selected_source;
    gchar        *selected_source_uri;

    GConfClient *gconf = stuff->target->gconf;

    source_list = e_source_list_new_for_gconf (gconf, "/apps/evolution/addressbook/sources");
    combo_box = e_source_combo_box_new (source_list);

    if (type == GAIM_ADDRESSBOOK)
        selected_source_uri = gconf_client_get_string (gconf, GCONF_KEY_WHICH_ADDRESSBOOK_GAIM, NULL);
    else
        selected_source_uri = gconf_client_get_string (gconf, GCONF_KEY_WHICH_ADDRESSBOOK, NULL);
    selected_source = find_esource_by_uri (
        source_list, selected_source_uri);
    g_free (selected_source_uri);

    if (selected_source != NULL)
        e_source_combo_box_set_active (
            E_SOURCE_COMBO_BOX (combo_box), selected_source);

    gtk_widget_show (combo_box);

    stuff->source_list = source_list;

    return combo_box;
}

GtkWidget *
bbdb_page_factory (EPlugin *ep, EConfigHookItemFactoryData *hook_data)
{
    struct bbdb_stuff *stuff;
    EMConfigTargetPrefs *target = (EMConfigTargetPrefs *) hook_data->config->target;
    GtkWidget *page;
    GtkWidget *tab_label;
    GtkWidget *frame;
    GtkWidget *frame_label;
    GtkWidget *padding_label;
    GtkWidget *hbox;
    GtkWidget *inner_vbox;
    GtkWidget *check;
    GtkWidget *combo_box;
    GtkWidget *gaim_combo_box;
    GtkWidget *check_gaim;
    GtkWidget *label;
    GtkWidget *gaim_label;
    GtkWidget *button;
    gchar *str;

    /* A structure to pass some stuff around */
    stuff = g_new0 (struct bbdb_stuff, 1);
    stuff->target = target;

    /* Create a new notebook page */
    page = gtk_vbox_new (FALSE, 0);
    GTK_CONTAINER (page)->border_width = 12;
    tab_label = gtk_label_new (_("Automatic Contacts"));
    gtk_notebook_append_page (GTK_NOTEBOOK (hook_data->parent), page, tab_label);

    /* Frame */
    frame = gtk_vbox_new (FALSE, 6);
    gtk_box_pack_start (GTK_BOX (page), frame, FALSE, FALSE, 0);

    /* "Automatic Contacts" */
    frame_label = gtk_label_new ("");
    str = g_strdup_printf ("<span weight=\"bold\">%s</span>", _("Automatic Contacts"));
    gtk_label_set_markup (GTK_LABEL (frame_label), str);
    g_free (str);
    GTK_MISC (frame_label)->xalign = 0.0;
    gtk_box_pack_start (GTK_BOX (frame), frame_label, FALSE, FALSE, 0);

    /* Indent/padding */
    hbox = gtk_hbox_new (FALSE, 12);
    gtk_box_pack_start (GTK_BOX (frame), hbox, FALSE, TRUE, 0);
    padding_label = gtk_label_new ("");
    gtk_box_pack_start (GTK_BOX (hbox), padding_label, FALSE, FALSE, 0);
    inner_vbox = gtk_vbox_new (FALSE, 6);
    gtk_box_pack_start (GTK_BOX (hbox), inner_vbox, FALSE, FALSE, 0);

    /* Enable BBDB checkbox */
    check = gtk_check_button_new_with_mnemonic (_("Create _address book entries when sending mails"));
    gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (check), gconf_client_get_bool (target->gconf, GCONF_KEY_ENABLE, NULL));
    g_signal_connect (GTK_TOGGLE_BUTTON (check), "toggled", G_CALLBACK (enable_toggled_cb), stuff);
    gtk_box_pack_start (GTK_BOX (inner_vbox), check, FALSE, FALSE, 0);
    stuff->check = check;

    label = gtk_label_new (_("Select Address book for Automatic Contacts"));
    gtk_box_pack_start (GTK_BOX (inner_vbox), label, FALSE, FALSE, 0);

    /* Source selection combo box */
    combo_box = create_addressbook_combo_box (stuff, AUTOMATIC_CONTACTS_ADDRESSBOOK);
    g_signal_connect (combo_box, "changed", G_CALLBACK (source_changed_cb), stuff);
    gtk_widget_set_sensitive (combo_box, gconf_client_get_bool (target->gconf, GCONF_KEY_ENABLE, NULL));
    gtk_box_pack_start (GTK_BOX (inner_vbox), combo_box, FALSE, FALSE, 0);
    stuff->combo_box = combo_box;

    /* "Instant Messaging Contacts" */
    frame = gtk_vbox_new (FALSE, 6);
    gtk_box_pack_start (GTK_BOX (page), frame, TRUE, TRUE, 24);

    frame_label = gtk_label_new ("");
    str = g_strdup_printf ("<span weight=\"bold\">%s</span>", _("Instant Messaging Contacts"));
    gtk_label_set_markup (GTK_LABEL (frame_label), str);
    g_free (str);
    GTK_MISC (frame_label)->xalign = 0.0;
    gtk_box_pack_start (GTK_BOX (frame), frame_label, FALSE, FALSE, 0);

    /* Indent/padding */
    hbox = gtk_hbox_new (FALSE, 12);
    gtk_box_pack_start (GTK_BOX (frame), hbox, FALSE, TRUE, 0);
    padding_label = gtk_label_new ("");
    gtk_box_pack_start (GTK_BOX (hbox), padding_label, FALSE, FALSE, 0);
    inner_vbox = gtk_vbox_new (FALSE, 6);
    gtk_box_pack_start (GTK_BOX (hbox), inner_vbox, FALSE, FALSE, 0);

    /* Enable Gaim Checkbox */
    check_gaim = gtk_check_button_new_with_mnemonic (_("Synchronize contact info and images from Pidgin buddy list"));
    gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (check_gaim), gconf_client_get_bool (target->gconf, GCONF_KEY_ENABLE_GAIM, NULL));
    g_signal_connect (GTK_TOGGLE_BUTTON (check_gaim), "toggled", G_CALLBACK (enable_gaim_toggled_cb), stuff);
    gtk_box_pack_start (GTK_BOX (inner_vbox), check_gaim, FALSE, FALSE, 0);
    stuff->check_gaim = check_gaim;

    gaim_label = gtk_label_new (_("Select Address book for Pidgin buddy list"));
    gtk_box_pack_start (GTK_BOX (inner_vbox), gaim_label, FALSE, FALSE, 0);

    /* Gaim Source Selection Combo Box */
    gaim_combo_box = create_addressbook_combo_box (stuff, GAIM_ADDRESSBOOK);
    g_signal_connect (gaim_combo_box, "changed", G_CALLBACK (gaim_source_changed_cb), stuff);
    gtk_widget_set_sensitive (gaim_combo_box, gconf_client_get_bool (target->gconf, GCONF_KEY_ENABLE_GAIM, NULL));
    gtk_box_pack_start (GTK_BOX (inner_vbox), gaim_combo_box, FALSE, FALSE, 0);
    stuff->gaim_combo_box = gaim_combo_box;

    /* Synchronize now button. */
    button = gtk_button_new_with_mnemonic (_("Synchronize with _buddy list now"));
    g_signal_connect (GTK_BUTTON (button), "clicked", G_CALLBACK (synchronize_button_clicked_cb), stuff);
    gtk_box_pack_start (GTK_BOX (inner_vbox), button, FALSE, FALSE, 0);

    /* Clean up */
    g_signal_connect (page, "destroy", G_CALLBACK (cleanup_cb), stuff);

    gtk_widget_show_all (page);

    return page;
}

static void
cleanup_cb (GObject *o, gpointer data)
{
    struct bbdb_stuff *stuff = data;

    g_object_unref (stuff->source_list);
    g_free (stuff);
}